<!DOCTYPE html>
<html lang="zh_CN">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .box{
            display: flex;

            width: 500px;
            height: 500px;
            border: 1px solid red;
        }
        .box1{
            /*默认值*/
            /*flex-shrink: 1;*/
            width: 100px;
            height: 100px;
            background-color: #f00;
        }

        .box2{

            flex-shrink: 0;

            width: 100px;
            height: 100px;
            background-color: #0f0;
        }

        .box3{
            flex-shrink: 0;

            width: 100px;
            height: 100px;
            background-color: #00f;
        }
        .box4{
            width: 300px;
            height: 100px;
            background-color: gold;
        }






    </style>
</head>
<body>
    <div class="box">
        <div class="box1"></div>
        <div class="box2"></div>
        <div class="box3"></div>
        <div class="box4"></div>
    </div>
</body>
<script type="text/javascript">

</script>

</html>
